CVE-2022-49307

tty: synclink_gt: Fix null-pointer-dereference in slgt_clean()

MEDIUM

5.5

CVSS Score

Published: February 26, 2025 at 02:10 AM UTC

Updated: June 17, 2026 at 05:17 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: tty: synclink_gt: Fix null-pointer-dereference in slgt_clean() When the driver fails at alloc_hdlcdev(), and then we remove the driver module, we will get the following splat: [ 25.065966] general protection fault, probably for non-canonical address 0xdffffc0000000182: 0000 [#1] PREEMPT SMP KASAN PTI [ 25.066914] KASAN: null-ptr-deref in range [0x0000000000000c10-0x0000000000000c17] [ 25.069262] RIP: 0010:detach_hdlc_protocol+0x2a/0x3e0 [ 25.077709] Call Trace: [ 25.077924] <TASK> [ 25.078108] unregister_hdlc_device+0x16/0x30 [ 25.078481] slgt_cleanup+0x157/0x9f0 [synclink_gt] Fix this by checking whether the 'info->netdev' is a null pointer first.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

v < 4.9.3182.6.16 ≤ v < 4.14.2832.6.16 ≤ v < 4.19.2472.6.16 ≤ v < 4.9.3182.6.16 ≤ v < 5.10.1222.6.16 ≤ v < 5.15.472.6.16 ≤ v < 5.17.152.6.16 ≤ v < 5.18.42.6.16 ≤ v < 5.192.6.16 ≤ v < 5.4.1984.10 ≤ v < 4.14.2834.15 ≤ v < 4.19.2474.20 ≤ v < 5.4.1985.11 ≤ v < 5.15.475.16 ≤ v < 5.17.155.18 ≤ v < 5.18.45.5 ≤ v < 5.10.1222.6.16705b6c7b34f2621f95f606d0e683daa10cdb8eb9

Vendor states this is fixed in 078212ad15dbd88840c82c97f12c93d83703c8fd (fixed)

Vendor states this is fixed in 1ceb4ca9543a8a788febf6bc8dad2e605e172d5e (fixed)

Vendor states this is fixed in 50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d (fixed)

Vendor states this is fixed in 689ca31c542687709ba21ec2195c1fbce34fd029 (fixed)

Vendor states this is fixed in 8a95696bdc0e13f8980f05b54a3b9081963d1256 (fixed)

Vendor states this is fixed in ba08cbc5b53e151d0acf1930fb526fc65b7f3e65 (fixed)

Vendor states this is fixed in d68d5e68b7f64de7170f8e04dd9b995c36b2c71c (fixed)

Vendor states this is fixed in ddd67751ab86c6a65f95c35293c42f85a42ac05d (fixed)

Vendor states this is fixed in f6e07eb7ebec53ffe81fc2489589320fbe4a6b75 (fixed)

Vendor states this is fixed in 2.6.16 (unaffected)

Vendor states this is fixed in 4.14.283 (unaffected)

Vendor states this is fixed in 4.19.247 (unaffected)

Vendor states this is fixed in 4.9.318 (unaffected)

Vendor states this is fixed in 5.10.122 (unaffected)

Vendor states this is fixed in 5.15.47 (unaffected)

Vendor states this is fixed in 5.17.15 (unaffected)

Vendor states this is fixed in 5.18.4 (unaffected)

Vendor states this is fixed in 5.19 (unaffected)

Vendor states this is fixed in 5.4.198 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references